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BMA150 bảng dữ liệu(PDF) 29 Page - Bosch Sensortec GmbH

tên linh kiện BMA150
Giải thích chi tiết về linh kiện  Digital, triaxial acceleration sensor
PDF  56 Pages
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nhà sản xuất  BOSCH [Bosch Sensortec GmbH]
Trang chủ  https://www.bosch-sensortec.com
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BMA150 bảng dữ liệu(HTML) 29 Page - Bosch Sensortec GmbH

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Data sheet
BMA150
Triaxial, digital acceleration sensor
Bosch Sensortec
Rev. 1.6
Page 29
30 October 2008
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such
as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
4.1.2 Three-wire SPI interface
3-wire SPI is not the default serial interface. The customer can easily activate the 3-wire SPI by
setting a control bit (SPI4=0). The 3-wire SPI interface uses SCK (serial clock), CSB (chip
select, active low) and SDA (serial data in/out). A maximum clock frequency up to 70MHz can
be handled.
The protocol data acquisition by the sensor IC occurs at the rising edge of SCK. The output data
provided by the sensor IC is synchronized also on the rising edges of SCK. The 3-wire read
protocol needs one extra clock cycle between address byte and data output byte.
Figure 8: Timing diagram for three-wire SPI interface (SDI = SDA)
CSB
SCK
T_setup_csb_3
T_hold_csb_3
SDI
7
6
5
4
3
2
1
0
Xtra
7
6
5
4
3
2
1
0
r
A6
A5
A4
A3
A2
A1
A0
T_delay_sdi_3
T_setup_sdi_3
T_hold_sdi_3
D6
D5
D4
D3
D2
D1
D0
D7
T_low_sck_3
T_high_sck_3
T_delay_sdi_3



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